Display device and method of manufacturing the same for providing consistent display quality

ABSTRACT

A display device includes an active pattern disposed on a substrate, a first transistor, a first scan line, a first power voltage line, a first electrode pattern and an organic light-emitting layer disposed on the substrate. The first transistor includes a first gate electrode disposed in a first overlapping area of the active pattern where the first gate electrode overlaps the active pattern. The first scan line is disposed adjacent to the first gate electrode. The first power voltage line includes a first electrode portion and a second electrode portion. The first electrode portion overlaps the first gate electrode. The second electrode portion extends from the first electrode portion in a direction crossing the first scan line and overlaps the first scan line.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean PatentApplication No. 10-2019-0015973 under 35 U.S.C. § 119, filed on Feb. 12,2019 in the Korean Intellectual Property Office, the disclosure of whichis incorporated by reference herein in its entirety.

BACKGROUND 1. Field

Embodiments relate to a display device and a method for manufacturingthe display device. More particularly, the embodiments relate to adisplay device capable of improving display quality and a method formanufacturing the display device.

2. Description of the Related Art

A flat display device is often in widespread use. An organiclight-emitting display device is relatively thin and light, and has alow power consumption and a high response speed. In these and otherrespects, the organic light-emitting display device is continuallydeveloped to improve a display thereof.

The organic light-emitting display device may include thin filmtransistors and an organic light-emitting element connected to the thinfilm transistors. The organic light-emitting element may emit a lighthaving an intensity corresponding to a voltage applied to the organiclight-emitting element through the thin film transistors.

SUMMARY

Embodiments herein provide a display device for improving displayquality, and a method of manufacturing the display device.

According to an embodiment, a display device may include an activepattern disposed on a substrate, a first transistor, a first scan line,a first power voltage line, a first electrode pattern and an organiclight-emitting layer disposed on the substrate. The first transistorincludes a first gate electrode disposed in a first overlapping area ofthe active pattern where the first gate electrode may overlap the activepattern. The first scan line may be disposed adjacent to the first gateelectrode. The first power voltage line may include a first electrodeportion and a second electrode portion. The first electrode portion mayoverlap the first gate electrode. The second electrode portion mayextend from the first electrode portion in a direction crossing thefirst scan line and may overlap the first scan line.

The display device may further include a first insulation layer disposedon the active pattern, a second insulation layer disposed on the firstgate electrode, a third insulation layer disposed on the first powervoltage line and a fourth insulation layer disposed on the firstelectrode pattern. The first gate electrode may be disposed on the firstinsulation layer, the first power voltage line may be disposed on thesecond insulation layer, and the first electrode pattern may be disposedon the third insulation layer

The display device may further include a second transistor and a thirdtransistor. The second transistor may include a second gate electrodedisposed in a second overlapping area of the active pattern where thefirst scan line may overlap the active pattern. The third transistor mayinclude a third gate electrode disposed in a third overlapping area ofthe active pattern where the first scan line may overlap the activepattern. The first electrode pattern may be connected to a third drainelectrode of the third transistor.

The display device may further include a data line crossing the firstscan line, and a second power voltage line crossing the first powervoltage line and that is connected to the first power voltage line.

The display device may further include a second scan line disposedparallel to the first scan line, a fourth transistor and a seventhtransistor. The fourth transistor may include a fourth gate electrodedisposed in a fourth overlapping area of the active pattern where thesecond scan line may overlap the active pattern. The seventh transistormay include a seventh gate electrode disposed in a seventh overlappingarea of the active pattern where the second scan line may overlap theactive pattern.

The display device may further include an initializing voltage linedisposed parallel to the first scan line, and a second electrode patternconnecting the initializing voltage line to the seventh drain electrodeof the seventh transistor.

The display device may further include a light-emitting line disposedparallel to the first scan line, a fifth transistor and a sixthtransistor. The fifth transistor may include a fifth gate electrodedisposed in a fifth overlapping area of the active pattern where thelight-emitting line may overlap the active pattern. The sixth transistormay include a sixth gate electrode disposed in a sixth overlapping areaof the active pattern where the light-emitting line may overlap theactive pattern.

The display device may further include a third electrode patternconnected to a sixth drain electrode of the sixth transistor.

According to an embodiment, a display device may include a firsttransistor, a second transistor, a power voltage line, a first storagecapacitor, a second storage capacitor, a third transistor and an organiclight-emitting diode. The second transistor may be connected to a firstscan line, a data line crossing the first scan line and a sourceelectrode of the first transistor. The power voltage line may transfer afirst power voltage. The first storage capacitor may be connected to thepower voltage line and a gate electrode of the first transistor. Thesecond storage capacitor may be connected to the power voltage line andthe gate electrode of the first transistor. The third transistor may beconnected to the first scan line, the gate electrode of the firsttransistor and a drain electrode of the first transistor. The organiclight-emitting diode may receive a second power voltage and generate alight in response to operation of the first transistor.

The display device may further include a fifth transistor and a sixthtransistor. The fifth transistor may be connected to a light-emittingline, the power voltage line and the source electrode of the firsttransistor. The sixth transistor may be connected to the light-emittingline, a drain electrode of the first transistor and the organiclight-emitting diode.

The display device may further include a fourth transistor and a seventhtransistor. The fourth transistor may be connected to a second scanline, the gate electrode of the first transistor and an initializingvoltage line receiving an initializing voltage. The seventh transistormay be connected to the second scan line, the initializing voltage lineand the organic light-emitting diode

The first scan line may receive an n-th scan signal, wherein n is anatural number, and the second scan line receives an (n−1)-th scansignal.

The display device may further include a capacitor connected to thepower voltage line and the gate electrode of the second transistor.

According to an embodiment, a method for manufacturing a display deviceis provided. According to the method, an active pattern may be formed ona substrate. A first transistor may be formed. The first transistor mayinclude a first gate electrode disposed in a first overlapping area ofthe active pattern where the first gate electrode may overlap the activepattern. A first scan line may be formed to be adjacent to the firstgate electrode. A first power voltage line may be formed. The firstpower voltage line may include a first electrode portion overlapping thefirst gate electrode and a second electrode portion, which may extendfrom the first electrode portion in a direction crossing the first scanline and may overlap the first scan line. A first electrode pattern maybe formed. The first electrode pattern may be connected to the firstgate electrode and may overlap the second electrode portion. An organiclight-emitting layer may be formed on the substrate.

A first insulation layer may be formed on the active pattern. A secondinsulation layer may be formed on the first gate electrode. A thirdinsulation layer may be formed on the first power voltage line. A fourthinsulation layer may be formed on the first electrode pattern. The firstgate electrode may be disposed on the first insulation layer, the firstpower voltage line may be disposed on the second insulation layer, andthe first electrode pattern may be disposed on the third insulationlayer.

A second transistor may be formed. The second transistor may include asecond gate electrode in a second overlapping area of the active patternwhere the first scan line may overlap the active pattern. A thirdtransistor may be formed. The third transistor may include a third gateelectrode in a third overlapping area of the active pattern where thefirst scan line may overlap the active pattern. The first electrodepattern may be connected to a third drain electrode of the thirdtransistor.

A data line, which crosses the first scan line, may be formed. A secondpower voltage line, which crosses the first power voltage line and isconnected to the first power voltage line, may be formed.

A second scan line may be formed to be parallel to the first scan line.A fourth transistor may be formed. The fourth transistor may include afourth gate electrode disposed in a fourth overlapping area of theactive pattern where the second scan line may overlap the activepattern. A seventh transistor may be formed. The seventh transistor mayinclude a seventh gate electrode disposed in a seventh overlapping areaof the active pattern where the second scan line may overlap the activepattern.

A light-emitting line may be formed to be parallel to the first scanline. A fifth transistor may be formed. The fifth transistor may includea fifth gate electrode disposed in a fifth overlapping area of theactive pattern where the light-emitting line may overlap the activepattern. A sixth transistor may be formed. The sixth transistor mayinclude a sixth gate electrode disposed in a sixth overlapping area ofthe active pattern where the light-emitting line may overlap the activepattern.

An initializing voltage line may be formed to be parallel to the firstscan line. A second electrode pattern may be formed to connect theinitializing voltage line to a seventh drain electrode of the seventhtransistor. A third electrode pattern may be formed to be connected to asixth drain electrode of the sixth transistor.

An electrode of a second conductive pattern, which receives a powervoltage, may be disposed between a scan line, which may be a firstconductive pattern, and a drain electrode of a third transistor, whichmay be a third conductive pattern. Thus, a parasitic capacitortherebetween the first and third conductive patterns is unnecessary, anda storage capacitance may be increased. Thus, a kickback voltage of thethird transistor may be decreased, thereby preventing image defects suchas a decrease in brightness and low brightness smudge.

BRIEF DESCRIPTION OF THE DRAWINGS

Aspects of one or more embodiments may be more clearly understood fromthe following detailed description when taken in conjunction with theaccompanying drawings, in which:

FIG. 1 is a plan view illustrating a display device according to anembodiment.

FIG. 2 is a schematic diagram of an equivalent circuit of a pixel of thedisplay device of FIG. 1.

FIG. 3 is a waveform diagram illustrating a method for driving a pixelof the display device of FIG. 1.

FIG. 4 is an enlarged plan view illustrating a pixel of the displaydevice of FIG. 1.

FIG. 5 is a schematic cross-sectional view of FIG. 4 taken along lineI-I′ of FIG. 4.

FIGS. 6 to 10 are plan views illustrating a method for manufacturing adisplay device according to an embodiment.

FIGS. 11A and 11B illustrate a plan view and schematic diagram of anequivalent circuit of a pixel, respectively, according to a comparativeexample.

FIG. 12 is a schematic diagram of an equivalent circuit of a pixel,according to an embodiment, for comparison with the comparative exampleof FIG. 11B.

DETAILED DESCRIPTION

A display device and a method for manufacturing a display deviceaccording to embodiments of the disclosure will be described hereinafterwith reference to the accompanying drawings, in which some embodimentsare shown.

Although the disclosure may be modified in various manners and haveadditional embodiments, embodiments are illustrated in the accompanyingdrawings and will be mainly described in the specification. However, thescope of the disclosure is not limited to the embodiments in theaccompanying drawings and the specification and should be construed asincluding all the changes, equivalents and substitutions included in thespirit and scope of the disclosure.

The drawings and description are to be regarded as only illustrative innature, and thus are not limiting of embodiments described and claimedherein. Some of the parts which are not associated with the descriptionmay not be provided in order to describe embodiments of the disclosureand like reference numerals refer to like elements throughout thespecification.

In the drawings, a size and thickness of each element are arbitrarilyrepresented for better understanding and ease of description, howeverthe disclosure is not limited thereto. In the drawings, the thickness oflayers, panels, regions, and other elements may be exaggerated forclarity. In the drawings, for better understanding and ease ofdescription, the thicknesses of some layers and areas may beexaggerated.

Further, in the specification, the phrase “in a plan view” means when anobject portion is viewed from above, and the phrase “in across-sectional view” means when a cross-section taken by verticallycutting an object portion is viewed from the side. Additionally, theterms “overlap” or “overlapped” mean that a first object may be above orbelow a second object, and vice versa. The terms “face” and “facing”mean that a first object may directly or indirectly oppose a secondobject. In a case in which a third object intervenes between the firstand second object, the first and second objects may be understood asbeing indirectly opposed to one another, although still facing eachother. When a layer, region, substrate, or area, is referred to as being“on” another layer, region, substrate, or area, it may be directly onthe other region, substrate, or area, or intervening regions,substrates, or areas, may be present therebetween. Conversely, when alayer, region, substrate, or area, is referred to as being “directly on”another layer, region, substrate, or area, intervening layers, regions,substrates, or areas, may be absent therebetween. Further when a layer,region, substrate, or area, is referred to as being “below” anotherlayer, region, substrate, or area, it may be directly below the otherlayer, region, substrate, or area, or intervening layers, regions,substrates, or areas, may be present therebetween. Conversely, when alayer, region, substrate, or area, is referred to as being “directlybelow” another layer, region, substrate, or area, intervening layers,regions, substrates, or areas, may be absent therebetween. Further,“over” or “on” may include positioning on or below an object and doesnot necessarily imply a direction based upon gravity.

The spatially relative terms “below”, “beneath”, “lower”, “above”,“upper”, or the like, may be used herein for ease of description todescribe the relations between one element or component and anotherelement or component as illustrated in the drawings. It will beunderstood that the spatially relative terms are intended to encompassdifferent orientations of the device in use or operation, in addition tothe orientation depicted in the drawings. For example, in the case wherea device illustrated in the drawing is turned over, the devicepositioned “below” or “beneath” another device may be placed “above”another device. Accordingly, the illustrative term “below” may includeboth the lower and upper positions. The device may also be oriented inother directions and thus the spatially relative terms may beinterpreted differently depending on the orientations.

Throughout the specification, when an element is referred to as being“connected” to another element, the element may be “directly connected”to another element, or “electrically connected” to another element withone or more intervening elements interposed therebetween. It will befurther understood that when the terms “comprises,” “comprising,”“includes” and/or “including” are used in this specification, they or itmay specify the presence of stated features, integers, steps,operations, elements and/or components, but do not preclude the presenceor addition of other features, integers, steps, operations, elements,components, and/or any combination thereof.

It will be understood that, although the terms “first,” “second,”“third,” or the like may be used herein to describe various elements,these elements should not be limited by these terms. These terms areused to distinguish one element from another element or for theconvenience of description and explanation thereof. For example, when “afirst element” is discussed in the description, it may be termed “asecond element” or “a third element,” and “a second element” and “athird element” may be termed in a similar manner without departing fromthe teachings herein.

Unless otherwise defined, all terms used herein (including technical andscientific terms) have the same meaning as commonly understood by thoseskilled in the art to which this invention pertains. It will be furtherunderstood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art andwill not be interpreted in an ideal or excessively formal sense unlessclearly defined in the specification.

FIG. 1 is a plan view illustrating a display device according to anembodiment.

FIG. 2 is a schematic diagram of an equivalent circuit of a pixel of thedisplay device of FIG. 1. FIG. 3 is a waveform diagram illustrating amethod for driving a pixel of the display device of FIG. 1.

Referring to FIG. 1, a display device 1000 may include a panel part 100,a main driver 200, a scan driver 300 and a light-emitting driver 400.

The panel part 100 may include a display part DA and a peripheral partPA including peripheral areas around or surrounding the display part DA.

The display part DA may include scan lines SLn−1 and SLn, data linesDLm, light-emitting lines ELn, first power voltage lines PVL1, secondpower voltage lines PVL2, initializing voltage lines IVL and pixels P,where n and m are natural numbers.

The scan lines SLn−1 and SLn may extend in a first direction DD1 and maybe arranged in a second direction DD2 crossing the first direction DD1.The scan lines SLn−1 and SLn may be connected to the scan driver 300disposed in the peripheral area PA. The scan lines SLn−1 and SLn maytransfer scan signals provided from the scan driver 300 to the pixels P.

The data lines DLm may extend in the second direction DD2 and may bearranged in the first direction DD1. The data lines DLm may be connectedto the main driver 200 disposed in the peripheral area PA. The datalines DLm may transfer data signals provided from the main driver 200 tothe pixels P.

The light-emitting lines ELn may extend in the first direction DD1 andmay be arranged in the second direction DD2. The light-emitting linesELn may be connected to the light-emitting driver 400 disposed in theperipheral area PA. The light-emitting lines ELn may transferlight-emitting control signals provided from the light-emitting driver400 to the pixels P.

The first power voltage lines PVL1 may extend in the first direction DD1and may be arranged in the second direction DD2. The first power voltagelines PVL1 may be connected to the main driver 200. The first powervoltage lines PVL1 may transfer a first light-emitting power voltageELVDD provided from the main driver 200 to the pixels P.

The second power voltage lines PVL2 may extend in the second directionDD2 and may be arranged in the first direction DD1. The second powervoltage lines PVL2 may be connected to the first power voltage linesPVL1 to transfer the first light-emitting power voltage ELVDD providedfrom the main driver 200 to the pixels P. The first power voltage linesPVL1 and the second power voltage lines PVL2 may be arranged in a meshconfiguration.

The initializing voltage lines IVL may extend in the first direction DD1and may be arranged in the second direction DD2. The initializingvoltage lines IVL may be connected to the main driver 200. Theinitializing voltage lines IVL may transfer a initializing voltage Vintprovided from the main driver 200 to the pixels P.

Each of the pixels P may include an organic light-emitting diode OLEDand transistors for driving the organic light-emitting diode OLED.

For example, when referring to FIG. 2, the pixel P may include a pixelcircuit PC.

The pixel circuit PC may include an organic light-emitting diode OLED, afirst transistor T1, a first storage capacitor CST1, a second storagecapacitor CST2, a second transistor T2, a third transistor T3, a fourthtransistor T4, a fifth transistor T5, a sixth transistor T6 and aseventh transistor T7.

The organic light-emitting diode OLED may include a first diodeelectrode E1 and a second diode electrode E2. The first diode electrodeE1 may be an anode, and the second diode electrode E2 may be a cathode.A second light-emitting power voltage ELVSS may be applied to the seconddiode electrode E2.

The first transistor T1 may include a first gate electrode G1 connectedto a first node N1, a first source electrode S1 connected to a secondnode N2 and a first drain electrode D1 connected to a third node N3.

The first storage capacitor CST1 may include a first storage electrodeCE1 connected to the first node N1 and a second storage electrode CE2connected to a power voltage line PVL.

The second storage capacitor CST2 may include a third storage electrodeCE3 connected to the first node N1 and a fourth storage electrode CE4connected to the power voltage line PVL. The first and second storagecapacitors CST1 and CST2 may be connected in parallel, therebyincreasing a storage capacitance of the first transistor T1.

The second transistor T2 may include a second gate electrode G2connected to an n-th scan line SLn, a second source electrode S2connected to the data line DLm and a second drain electrode D2 connectedto the second node N2.

The third transistor T3 may include a third gate electrode G3 connectedto the n-th scan line SLn, a third source electrode S3 connected to athird node N3 and a third drain electrode connected to the first nodeN1. The third drain electrode D3 of the third transistor T3 is connectedto the first and second storage capacitors CST1 and CST2. A kickbackvoltage Vkickback of the third transistor T3 may be defined by thefollowing equation.

$\begin{matrix}{{Vkickback} = {\frac{Cpara}{{Cpara} + {{CST}\; 1} + {{CST}\; 1}} \times \Delta\;{Vg}}} & \left\lbrack {{Equation}\mspace{14mu} 1} \right\rbrack\end{matrix}$

In Equation 1, Cpara is a parasitic capacitance of the third transistorT3, CST1 is a capacitance of the first storage capacitor, CST2 is acapacitance of the second storage capacitor, and ΔVg is differencebetween a high voltage and a low voltage of a signal applied to the gateelectrode of the third transistor T3.

According to Equation 1, when capacitances of the first and secondstorage capacitors CST1 and CST2 increase, the kickback voltage of thethird transistor T3 may be reduced. When the kickback voltage of thethird transistor T3 is reduced, variance of the kickback voltage due toa deterioration difference of the third transistor T3 may be reduced.Thus, defects such as a decrease in brightness and a low brightnesssmudge, due to deterioration of the third transistor T3, may be reducedor prevented.

The fourth transistor T4 may include a fourth gate electrode G4connected to an (n−1)-th scan line SLn−1, a fourth source electrode S4connected to the initializing voltage line IVL and a fourth drainelectrode D4 connected to the first node N1.

The fifth transistor T5 may include a fifth gate electrode G5 connectedto an n-th light-emitting line ELn, a fifth source electrode S5connected to the power voltage line PVL and a fifth drain electrode D5connected to the second node N2.

The sixth transistor T6 may include a sixth gate electrode G6 connectedto the n-th light-emitting line ELn, a sixth source electrode S6connected to the third node N3 and a sixth drain electrode D6 connectedto the first diode electrode of the organic light-emitting diode OELD.

The seventh transistor T7 may include a seventh gate electrode G7connected to the (n−1)-th scan line SLn−1, a seventh source electrode S7connected to the first diode electrode of the organic light-emittingdiode OELD and a seventh drain electrode D7 connected to theinitializing voltage line IVL.

A method for driving the pixel circuit PC may be explained withreference to FIG. 3.

Referring to FIG. 3, during a first period ‘a’ of a frame, the fourthtransistor T4 and the seventh transistor T7 may be turned on in responseto a low voltage, which is a turn-on voltage of an (n−1)-th scan signalSSn−1 applied to the (n−1)-th scan line SLn−1, and the remainingtransistors T1, T2, T3, T5 and T6 may be turned off. Thus, a previousdata voltage charged at each of the first and second capacitors CTS1 andCTS2 may be initialized by the initializing voltage Vint applied to theinitializing voltage line IVL. The anode that is the first diodeelectrode of the organic light-emitting diode OELD may be initialized bythe initializing voltage Vint.

During a second period ‘b’ of the frame, the second transistor T2 andthe third transistor T3 may be turned on in response to a low voltage ofan n-th scan signal SSn applied to the n-th scan line SLn, and theremaining transistors T1, T4, T5, T6 and T7 may be turned off.

As the third transistor T3 is turned on, the first transistor T1 may bediode-connected. A voltage difference between a voltage Vdata applied tothe second node N2, which corresponds to a data signal applied to thedata line DLn, and a threshold voltage Vth of the first transistor T1may be applied to the first node N1. Thus, a voltage having an absolutevalue of a difference between the voltage Vdata corresponding to thedata voltage and the threshold voltage Vth may be applied to the firstnode N1. Thus, the threshold voltage of the first transistor T1 may becompensated.

Furthermore, the first and second capacitors CTS1 and CTS2 may becharged with a voltage corresponding to the data voltage Vdata.

As explained in the above, during the second period ‘b’ of the frame,the threshold voltage of the first transistor T1 may be compensated, anda voltage corresponding to the data voltage Vdata may be charged at thefirst and second capacitors CTS1 and CTS2.

During a third period ‘c’ of the frame, when an n-th light-emittingcontrol signal EMn with a low voltage is applied to the n-thlight-emitting line ELn, the fifth transistor T5 and the sixthtransistor T6 may be turned on, and the remaining transistors T2, T3, T4and T7 may be turned off.

Accordingly, the first transistor T1 may be turned on by the voltagecorresponding to the data voltage Vdata, which has been stored in thefirst and second capacitors CST1 and CST2, and a driving currentcorresponding to the data voltage Vdata may flow through the organiclight-emitting diode OLED. Thus, the organic light-emitting diode OLEDmay generate a light to display an image.

FIG. 4 is an enlarged plan view illustrating a pixel of the displaydevice of FIG. 1.

Referring to FIG. 4, the pixel P may include an active pattern ACT, afirst gate electrode G1, an n-th scan line SLn, a first power voltageline PVL1, a first electrode pattern EP1, an (n−1)-th scan line SLn−1,an initializing voltage line IVL, a second electrode pattern E2, an n-thlight-emitting line ELn, a third electrode pattern EP3, an m-th dataline DLm and a second power voltage line PVL2.

The active pattern ACT may be formed as a single pattern in a pixel areaof a substrate, where the pixel is defined.

The first gate electrode G1 may be disposed in a center portion of thepixel, and may have an island shape. The first transistor T1 may bedefined in a first overlapping area of the active pattern, whichoverlaps the first gate electrode G1 so as to face the first gateelectrode G1. As an example, the first overlapping area of the activepattern may indirectly face the gate electrode G1, such that there is aninsulation portion therebetween. The first gate electrode G1 may be thefirst storage electrode CE1 of the first capacitor CST1. The firsttransistor T1 may include a portion of the first insulation layer(discussed below) that is disposed between the first overlapping area ofthe active pattern and the first gate electrode G1.

The n-th scan line SLn may extend in a first direction DD1. The secondtransistor T2 may be defined in a second overlapping area of the activepattern ACT, which may overlap the n-th scan line SLn. The thirdtransistor T3 may be defined in a third overlapping area of the activepattern ACT, which may overlap the n-th scan line SLn.

The first power voltage line PVL1 may be spaced apart from and adjacentto the n-th scan line SLn in a second direction DD2, and may extend inthe first direction DD1. The first power voltage line PVL1 may include afirst electrode portion CE2, a second electrode portion CE4 and a thirdelectrode portion LE. Hereinafter, the first electrode portion CE2 maybe referred to as the second storage electrode CE2, the second electrodeportion CE4 may be referred to as the fourth storage electrode CE4, andthe third electrode portion LE may be referred to as a line electrodeLE.

The second storage electrode CE2 may be disposed in a center portion ofthe pixel to overlap the first gate electrode G1. The second storageelectrode CE2 may include a hole H corresponding to a center portion ofthe first gate electrode G1. The fourth storage electrode CE4 may extendfrom the second storage electrode CE2 toward the n-th scan line SLn tooverlap the n-th scan line SLn. In this way, the first power voltageline PVL1 may form each of the fourth storage electrode CE4 and thesecond storage electrode CE2. The line electrode LE may connect secondstorage electrodes CE2, which are disposed in adjacent pixels, to eachother. The first storage capacitor CST1 may be defined by the firststorage electrode CE1 that is the first gate electrode G1, and thesecond storage electrode CE2 included in the first power voltage linePVL1.

The first electrode pattern EP1 may overlap the fourth storage electrodeCE4 included in the first power voltage line PVL1. The first electrodepattern EP1 may be connected to the first gate electrode G1 through thehole H of the second storage electrode CE2. The first electrode patternEP1 may overlap or face the fourth storage electrode CE4. The firstelectrode pattern EP1 may be connected to the active pattern ACT wherethe third drain electrode D3 of the third transistor T3 is defined. Thefirst electrode pattern EP1 may overlap or face the fourth storageelectrode CE4 to define the third storage electrode CE3. The secondstorage capacitor CST2 may be defined by the third storage electrode CE3included in the first electrode pattern EP1 and the fourth storageelectrode CE4 included in the first power voltage line PVL1.

The (n−1)-th scan line SLn−1 may be spaced apart from the n-th scan lineSLn in the second direction DD2, and may extend in the first directionDD1. The fourth transistor T4 may be defined in a fourth overlappingarea of the active pattern ACT where the active pattern ACT overlaps the(n−1)-th scan line SLn−1. A seventh transistor T7 may be defined in aseventh overlapping area of the active pattern ACT where the activepattern ACT may overlap the (n−1)-th scan line SLn−1.

The initializing voltage line IVL may be spaced apart from the (n−1)-thscan line SLn−1 in the second direction DD2, and may extend in the firstdirection DD1.

The second electrode pattern EP2 may be connected to the initializingvoltage line IVL and the active pattern ACT where the seventh drainelectrode D7 of the seventh transistor T7 is defined.

The n-th light-emitting line ELn may be spaced apart from the n-th scanline SLn in the second direction DD2, and may extend in the firstdirection DD1. The fifth transistor T5 may be defined in a fifthoverlapping area of the active pattern ACT where the active pattern ACTmay overlap the n-th light-emitting line Eln. The sixth transistor T6may be defined in a sixth overlapping area of the active pattern ACTwhere the active pattern ACT may overlap the n-th light-emitting lineEln.

The third electrode pattern EP3 may be connected to the active patternACT where the sixth drain electrode D6 of the sixth transistor T6 isdefined.

The m-th data line DLm may extend in the second direction DD2, and maybe connected to the active pattern ACT where the second source electrodeS2 of the second transistor T2 is defined.

The second power voltage line PVL2 may extend in the second directionDD2, and may be connected to the first power voltage line PVL1. Forexample, the second power voltage line PVL2 may be connected to thesecond storage electrode CE2 included in the first power voltage linePVL1.

FIG. 5 is a schematic cross-sectional view of FIG. 4 taken along lineI-I′. FIGS. 6 to 10 are plan views illustrating a method formanufacturing a display device according to an embodiment.

Referring to FIGS. 5 and 6, a substrate 110 may be an insulationsubstrate including glass, polymer, stainless steel or the like. In anembodiment, the substrate 110 may include a first plastic layer, a firstbarrier layer, a second plastic layer and a second barrier layer. Forexample, the first and second plastic layers may include a polymer suchas polyimide (PI), polyethylene naphthalate (PEN), polyethyleneterephthalate (PET), polyacrylate (PAR), polycarbonate (PC),polyetherimide (PEI), polyethersulfone (PS) or combination thereof. Thefirst and second barrier layers may include amorphous silicon (a-Si),silicon oxide (SiOx), silicon nitride (SiNx) or combination thereof.

A semiconductor layer may be formed on the substrate 220, and may bepatterned to form an active pattern ACT. The active pattern ACT may beformed as a single pattern in a pixel area where a pixel P is defined.

The active pattern (ACT) may include polysilicon or oxide semiconductor.The oxide semiconductor may include an oxide or a compound oxide oftitanium (Ti), hafnium (Hf), zirconium (Zr), aluminum (Al), tantalum(Ta), germanium (Ge), zinc (Zn), gallium (Ga), tin (Sn) or indium (In).For example, the compound oxide may include In—Ga—Zn—O, Zn—In—O,Zn—Sn—O, In—Ga—O, In—Sn—O, In—Zr—O, In—Zr—Zn—O, In—Zr—Sn—O, In—Zr—Ga—O,In—Al—O, In—Zn—Al—O, In—Sn—Al—O, In—Al—Ga—O, In—Ta—O, In—Ta—Zn—O,In—Ta—Sn—O, In—Ta—Ga—O, In—Ge—O, In—Ge—Zn—O, In—Ge—Sn—O, In—Ge—Ga—O,Ti—In—Zn—O, Hf—In—Zn—O or a combination thereof.

Referring to FIGS. 5 and 7, a first insulation layer 120 may be formedon the substrate 110 having the active pattern ACT. The first insulationlayer 120 may be disposed on the substrate 110 to cover and be over theactive pattern ACT. The first insulation layer 120 may be an inorganicinsulation layer including silicon nitride, silicon oxide, siliconoxynitride or the like.

A first conductive layer may be formed on the first insulation layer 120and may be patterned to form a first conductive pattern. The firstconductive pattern may include a first gate electrode G1, an (n−1)-thscan line SLn−1, an n-th scan line SLn and an n-th light-emitting lineELn.

The substrate 110 having the first conductive pattern G1, SLn−1, SLn andELn may be doped with impurities to form a channel, a source electrodeand a drain electrode of a transistor. The channel may be doped withn-type impurities or p-type impurities. The source electrode and thedrain electrode may be spaced apart from each other by the channelinterposed therebetween, and may be doped with impurities of an oppositetype to the impurities of the channel.

As illustrated in FIG. 7, a first channel C1 may be formed in the firstoverlapping area of the active pattern ACT, which may overlap the firstgate electrode G1. The first source electrode Si and the first drainelectrode D1 may be formed in areas of the active pattern ACT, which maybe spaced apart from each other by the first channel C1 interposedtherebetween. The first gate electrode G1 may be defined as the firststorage electrode CE1 of the first storage capacitor CST1. The firstgate electrode G1, the first source electrode S1 and the first drainelectrode D1 may form a first transistor T1.

A second channel C2 may be formed in a second overlapping area of theactive pattern ACT, which may overlap the n-th scan line SLn. The secondsource electrode S2 and the second drain electrode D2 may be formed inareas of the active pattern ACT, which may be spaced apart from eachother by the second channel C2 interposed therebetween. The second gateelectrode G2 may be defined by an area of the n-th scan line SLnoverlapping the second channel C2. The second gate electrode G2, thesecond source electrode S2 and the second drain electrode D2 may formthe second transistor T2.

A third channel C3 may be formed in the third overlapping area of theactive pattern ACT, which may overlap the n-th scan line SLn. The thirdsource electrode S3 and the third drain electrode D3 may be formed inareas of the active pattern ACT, which may be spaced apart from eachother by the third channel C3 interposed therebetween. The third gateelectrode G3 may be defined by an area of the n-th scan line SLnoverlapping the third channel C3. The third gate electrode G3, the thirdsource electrode S3 and the third drain electrode D3 may form the thirdtransistor T3.

A fourth channel C4 may be formed in the fourth overlapping area of theactive pattern ACT, which may overlap the (n−1)-th scan line SLn−1. Thefourth source electrode S4 and the fourth drain electrode D4 may beformed in areas of the active pattern ACT, which may be spaced apartfrom each other by the fourth channel C4 interposed therebetween. Thefourth gate electrode G4 may be defined by an area of the (n−1)-th scanline SLn−1 overlapping the fourth channel C4. The fourth gate electrodeG4, the fourth source electrode S4 and the fourth drain electrode D4 mayform the fourth transistor T4.

A seventh channel C7 may be formed in a seventh overlapping area of theactive pattern ACT, which may overlap the (n−1)-th scan line SLn−1. Theseventh source electrode S7 and the seventh drain electrode D7 may beformed in areas of the active pattern ACT, which may be spaced apartfrom each other by the seventh channel C7 interposed therebetween. Theseventh gate electrode G7 may be defined by an area of the (n−1)-th scanline SLn−1 overlapping the seventh channel C7. The seventh gateelectrode G7, the seventh source electrode S7 and the seventh drainelectrode D7 may form the seventh transistor T7.

A fifth channel C5 may be formed in a fifth overlapping area of theactive pattern ACT, which may overlap the n-th light-emitting line ELn.The fifth source electrode S5 and the fifth drain electrode D5 may beformed in areas of the active pattern ACT, which may be spaced apartfrom each other by the fifth channel C5 interposed therebetween. A fifthgate electrode G5 may be defined by an area of the n-th light-emittingline ELn overlapping the fifth channel C5. The fifth gate electrode G5,the fifth source electrode S5 and the fifth drain electrode D5 may forma fifth transistor T5.

A sixth channel C6 may be formed in a sixth overlapping area of theactive pattern ACT, which may overlap the n-th light-emitting line ELn.The sixth source electrode S6 and the sixth drain electrode D6 may beformed in areas of the active pattern ACT, which may be spaced apartfrom each other by the sixth channel C6 interposed therebetween. Thesixth gate electrode G6 may be defined by an area of the n-thlight-emitting line ELn overlapping the sixth channel C6. The sixth gateelectrode G6, the sixth source electrode S6 and the sixth drainelectrode D6 may form the sixth transistor T6.

Referring to FIGS. 5 and 8, a second insulation layer 130 may be formedon the substrate 110 having the first conductive pattern G1, SLn−1, SLnand ELn. The second insulation layer 130 may cover and be over the firstconductive pattern G1, SLn−1, SLn and ELn and may be disposed on thefirst insulation layer 120. The second insulation layer 130 may be aninorganic insulation layer including silicon nitride, silicon oxide,silicon oxynitride or the like.

A second conductive layer may be formed on the second insulation layer130 and may be patterned to form a second conductive pattern.

The second conductive pattern may include an initializing voltage lineIVL and a first power voltage line PVL1.

The initializing voltage line IVL may transfer an initializing voltageVint. The initializing voltage line IVL may be spaced apart from the(n−1)-th scan line SLn−1 in the second direction DD2, and may extend inthe first direction DD1.

The first power voltage line PVL1 may transfer a first light-emittingpower voltage ELVDD. The first power voltage line PVL1 may be adjacentto the n-th scan line SLn in the second direction DD2, and may extend inthe first direction DD1. The first power voltage line PVL1 may include asecond storage electrode CE2, a fourth storage electrode CE4 and a lineelectrode LE, which may be defined in a single pattern.

The second storage electrode CE2 may overlap the first gate electrodeG1, and may have a hole H overlapping a center portion of the first gateelectrode G1. The fourth storage electrode CE4 may extend from thesecond storage electrode CE2 toward the n-th scan line SLn to overlapthe n-th scan line SLn. The line electrode LE may connect the secondstorage electrodes CE2 formed in adjacent pixels to each other. Thefirst storage capacitor CST1 may be formed by a first storage electrodeCE1 that is the first gate electrode G1 and the second storage electrodeCE2.

Referring to FIGS. 5 and 9, a third insulation layer 140 may be formedon the substrate 110 having the second conductive pattern IVL and PVL1.The insulation layer 140 may cover the second conductive pattern IVL andPVL1 and may be disposed on the second insulation layer 130. The thirdinsulation layer 140 may include an inorganic insulation layer includingsilicon nitride, silicon oxide, silicon oxynitride or the like, anorganic insulation layer including an acrylic resin, an epoxy resin, apolyimide resin, a polyester resin or the like, or combination thereof.

At least one insulation layer may be partially removed to form contactholes CH, via holes VH1 and second via holes VH2.

The contact holes CH may pass through the first insulation layer 120,the second insulation layer 130 and the third insulation layer 140 toexpose the active pattern ACT.

The first via holes VH1 may pass through the second insulation layer 130and the third insulation layer 140 to expose the first conductivepattern. For example, the first via holes VH1 may pass through thesecond insulation layer 130 and the third insulation layer 140 to exposethe first gate electrode G1.

The second via holes VH2 may pass through the third insulation layer 140to expose the second conductive pattern. For example, the second viaholes VH2 may expose the first power voltage line PVL1 and a portion ofthe initializing voltage line IVL.

Referring to FIGS. 5 and 10, a third conductive layer may be formed onthe substrate 110 having the contact holes CH, the first via holes VH1and the second via holes VH2 and patterned to form a third conductivepattern.

The third conductive pattern may include an m-th data line DLm, a secondpower voltage line PVL2, a first electrode pattern EP1, a secondelectrode pattern EP2 and a third electrode pattern EP3.

The m-th data line DLm may extend in the second direction DD2, and maybe connected to the active pattern ACT where a second source electrodeSE of the second transistor T2 is defined.

The second power voltage line PVL2 may extend in the second directionDD2, and may be connected to the first power voltage line PVL1. Forexample, the second power voltage line PVL2 may be connected to thesecond storage electrode CE2 of the first power voltage line PVL1.

The first electrode pattern EP1 may overlap or face the fourth storageelectrode CE4 included in the first power voltage line PVL1. The firstelectrode pattern EP1 may be connected to the first gate electrode G1through the hole H of the second storage electrode CE2. The firstelectrode pattern EP1 may overlap or face the fourth storage electrodeCE4 overlapping the n-th scan line SLn. The first electrode pattern EP1may be connected to the active pattern ACT where the third drainelectrode D2 of the third transistor T3 is defined. A third storageelectrode CE3 may be defined in an area where the first electrodepattern CE3 may overlap the fourth storage electrode CE4. As the fourthstorage electrode CE4 included in the first power voltage line PVL1 isdisposed between the n-th scan line SLn and the first electrode patternEP1, a parasitic capacitance between the n-th scan line SLn and thethird drain electrode D3 of the third transistor T3, which is connectedto the first electrode pattern EP1, may be prevented.

The second storage capacitor CST2 may be formed by the third storageelectrode CE3 and the fourth storage electrode CE4.

The second electrode pattern EP2 may be connected to the initializingvoltage line IVL and the active pattern ACT where the seventh drainelectrode D7 of the seventh transistor T7 is defined.

The third electrode pattern EP3 may be connected to the active patternACT where the sixth drain electrode D6 of the sixth transistor T6.

A fourth insulation layer 150 may be formed on the substrate 110 havingthe third conductive pattern DLm, PVL2, EP1, EP2 and EP3. The fourthinsulation layer 150 may be provided as a flat surface on the thirdconductive pattern DLm, PVL2, EP1, EP2 and EP3. The fourth insulationlayer 150 may include an organic insulation layer, which may include anacrylic resin, an epoxy resin, a polyimide resin, a polyester resin orthe like, and/or an inorganic insulation layer, which includes siliconnitride, silicon oxide, silicon oxynitride or the like, or a combinationthereof.

A pixel electrode E1 may be formed on the fourth insulation layer 150.The pixel electrode E1 may be formed in each of pixels. The pixelelectrode E1 may be connected to the drain electrode D6 of the sixthtransistor T6 through a contact hole CH formed through the fourthinsulation layer 150. The pixel electrode E1 may include a metal, atransparent conductive oxide or the like.

A fifth insulation layer 160 may be disposed on the pixel electrode E1.The fifth insulation layer 160 may cover and be over an edge of thepixel electrode E1, and may be disposed on the fourth insulation layer150. The fifth insulation layer 160 may have an opening a portion of thepixel electrode E1. The opening may define a light-emitting area of thepixel. The fifth insulation layer 160 may include an organic insulationmaterial such as an acrylic resin, an epoxy resin, a polyimide resin, apolyester resin or the like.

An organic light-emitting layer OL may be disposed on the pixelelectrode E1. The organic light-emitting layer OL may be disposed with ahole injection layer (HIL) and/or a hole transport layer (HTL). The holetransport layer may have a high transport ability for holes and inhibitmovement of electrons, which are not combined with holes in the organiclight-emitting layer OL so that a recombination opportunity of electronsand holes may be prevented.

An opposing electrode E2 may be disposed to cover and be over an entirearea of the substrate 110 having the organic light-emitting layer OL.The opposing electrode E2 may include a metal, a transparent conductiveoxide or the like. The pixel electrode E1, the organic light-emittinglayer OL and the opposing electrode E2 may form an organiclight-emitting diode OLED.

FIGS. 11A and 11B illustrates a schematic diagram of an equivalentcircuit of a pixel according to a comparative example. FIG. 12 is aschematic diagram of an equivalent circuit of a pixel according to anembodiment for comparison with the comparative example.

Referring to FIGS. 11A and 11B, a pixel according to a comparativeexample includes a first transistor T1, a first power voltage line PVL1,a storage capacitor CST and a third transistor T3.

The first transistor T1 may include a first gate electrode G1. The firstgate electrode G1 may define a first storage electrode CE1 of thestorage capacitor CST.

The first power voltage line PVL1 may include a second storage electrodeCE2 overlapping the first gate electrode G1, which is the first storageelectrode CE1, and a line electrode LE. The line electrode may connectadjacent second storage electrodes formed in adjacent pixels to eachother.

The storage capacitor CST may be defined by the first storage electrodeCE1, which is the first gate electrode G1, and the second storageelectrode CE2 of the first power voltage line PVL1.

The third transistor T3 may include a third drain electrode D3, whichmay be formed as a first electrode pattern EP1. The first electrodepattern EP1 may be connected to the first gate electrode G1 and mayoverlap an n-th scan line SLn.

The n-th scan line SLn may be formed as a first conductive pattern. Thefirst electrode pattern EP1 including the third drain electrode D3 maybe formed as a third conductive pattern.

Thus, as illustrated in FIG. 11B, a parasitic capacitor Cpara_1 may beformed in an area where the n-th scan line SLn and the third drainelectrode D3 may overlap each other.

The parasitic capacitor Cpara_1 may increase a kickback voltageVkickback_1 of the third transistor T3, which is generated when an n-thscan signal applied to the n-th scan line SLn is changed into a turn-offvoltage from a turn-on voltage.

The kickback voltage Vkickback_1 of the third transistor T in thecomparative example may be defined by the following Equation 2.

$\begin{matrix}{{{Vkickback\_}1} = {\frac{{Cpara\_}1}{{CST}\; + {{Cpara\_}1}} \times \Delta\;{Vg}}} & \left\lbrack {{Equation}\mspace{14mu} 2} \right\rbrack\end{matrix}$

According to Equation 2, the parasitic capacitor Cpara_1 may increasethe kickback voltage Vkickback_1 of the third transistor T3. A varianceof the kickback voltage Vkickback_1 may be increased due todeterioration of the third transistor T3. The variance of the kickbackvoltage Vkickback_1 of the third transistor T3 may cause a decrease inbrightness and low brightness smudge.

Referring to FIGS. 4, 5 and 12, a pixel according to an embodiment mayinclude the first transistor T1, the first storage capacitor CST1, thefirst power voltage line PVL1, the third transistor T3 and the secondstorage capacitor CST2.

The first transistor T1 may include the first gate electrode G1. Thefirst gate electrode G1 may define a first storage electrode CE1 of thefirst storage capacitor CST1.

The first power voltage line PVL1 may include the second storageelectrode CE2, the fourth storage electrode CE4 and a line electrode LE,which are formed in a single pattern. The second storage electrode CE2may be disposed in a center portion of the pixel to overlap or face thefirst gate electrode G1. The fourth storage electrode CE4 may extendtoward to an n-th scan line SLn from the second storage electrode CE2 tooverlap or face the n-th scan line SLn. The line electrode LE mayconnect the second storage electrodes CE2 disposed in adjacent pixels toeach other.

The first storage capacitor CST1 may be defined in an area where thefirst gate electrode G1 and the second storage electrode CE2 overlap andface each other.

The third transistor T3 may include the third drain electrode D3, whichmay be formed as the first electrode pattern EP1. The first electrodepattern EP1 may be connected to the first gate electrode G1, and mayoverlap or face the fourth storage electrode CE4 overlapping the n-thscan line SLn. A third storage electrode CE3 may be defined in an areawhere the first electrode pattern EP1 may overlap or face the fourthstorage electrode CE4.

The second storage capacitor CST2 may be defined in an area where thefirst electrode pattern EP1 and the fourth storage electrode CE4 mayoverlap or face each other.

A parasitic capacitor Cpara* may be formed in an area where the n-thscan line SLn may overlap or face the fourth storage electrode CE4 thatis formed by a portion of the first power voltage line PVL1.

In an embodiment, the fourth storage electrode CE4 extending from thesecond storage electrode CE2 formed as a second conductive pattern mayoverlap the n-th scan line SLn formed as a first conductive pattern andthe third drain electrode D3 formed as a third conductive pattern. As aresult, the parasitic capacitor Cpara_1 of the comparative example maybe replaced, in an embodiment of the disclosure, by each of the secondstorage capacitor CST2 connected to the first storage capacitor CST1 inparallel, and the parasitic capacitor Cpara*connected to the first powervoltage line PVL1.

Thus, the kickback voltage Vkickback of the third transistor T3 may bedecreased by virtue of an increase in capacitances of the first andsecond storage capacitors CST1 and CST2.

According to an embodiment, the parasitic capacitor Cpara* may beremoved from the first gate electrode G1 of the first transistor T1.Thus, a driving reliability of the first transistor T1 and the thirdtransistor T3 may be improved.

According to an embodiment, the fourth storage electrode CE4 of thefirst power voltage line PVL1 formed as the second conductive patternmay shield the n-th scan line SLn formed as the first conductive patternfrom the third drain electrode D3 formed as the third conductivepattern. Thus, a parasitic capacitor therebetween is unnecessary.

According to an embodiment, an electrode of a second conductive pattern,which receives a power voltage, may be disposed between a scan line,which is a first conductive pattern, and a drain electrode of a thirdtransistor, which is a third conductive pattern. Thus, a parasiticcapacitor therebetween is unnecessary, and a storage capacitance may beincreased. Thus, a kickback voltage of the third transistor may bedecreased, thereby preventing image defects such as a decrease inbrightness and low brightness smudge.

An organic light-emitting display device according to embodiments may beused for a display device, which may be included in a personal computer,a notebook computer, a mobile phone, a smart phone, a PMP, a PDA, an MP3player or the like.

The foregoing is illustrative of embodiments herein and is not to beconstrued as limiting thereof. Although one or more embodiments havebeen described, those skilled in the art will readily appreciate thatmany modifications are possible without materially departing from thenovel teachings and aspects of the disclosure. Accordingly, all suchmodifications are intended to be included within the scope of thedisclosure. Therefore, it is to be understood that the foregoing isillustrative of various embodiments and is not to be construed aslimited to the specific embodiments disclosed, and that modifications tothe disclosed embodiments, as well as other embodiments, are intended tobe included within the scope of the disclosure, as set forth in thefollowing claims and equivalents thereof.

What is claimed is:
 1. A display device comprising: an active patterndisposed on a substrate; a first transistor including a first gateelectrode disposed in a first overlapping area of the active patternwhere the first gate electrode overlaps the active pattern in plan view;a first scan line disposed adjacent to the first gate electrode; a firstpower voltage line including a first electrode portion and a secondelectrode portion, the first electrode portion overlapping the firstgate electrode in plan view, the second electrode portion extending fromthe first electrode portion in a direction crossing the first scan lineand overlapping the first scan line in plan view at an overlap area; afirst electrode pattern connected to the first gate electrode andoverlapping the overlap area in plan view; and an organic light-emittinglayer disposed on the substrate.
 2. The display device of claim 1,further comprising: a first insulation layer disposed on the activepattern; a second insulation layer disposed on the first gate electrode;a third insulation layer disposed on the first power voltage line; and afourth insulation layer disposed on the first electrode pattern, whereinthe first gate electrode is disposed on the first insulation layer, thefirst power voltage line is disposed on the second insulation layer, andthe first electrode pattern is disposed on the third insulation layer.3. The display device of claim 1, further comprising: a secondtransistor including a second gate electrode disposed in a secondoverlapping area of the active pattern where the first scan lineoverlaps the active pattern; and a third transistor including a thirdgate electrode disposed in a third overlapping area of the activepattern where the first scan line overlaps the active pattern, whereinthe first electrode pattern is connected to a third drain electrode ofthe third transistor.
 4. The display device of claim 1, furthercomprising: a data line crossing the first scan line; and a second powervoltage line crossing the first power voltage line and being connectedto the first power voltage line.
 5. The display device of claim 1,further comprising: a second scan line disposed parallel to the firstscan line; a fourth transistor including a fourth gate electrodedisposed in a fourth overlapping area of the active pattern where thesecond scan line overlaps the active pattern; and a seventh transistorincluding a seventh gate electrode disposed in a seventh overlappingarea of the active pattern where the second scan line overlaps theactive pattern.
 6. The display device of claim 5, further comprising: aninitializing voltage line disposed parallel to the first scan line; anda second electrode pattern connecting the initializing voltage line to aseventh drain electrode of the seventh transistor.
 7. The display deviceof claim 1, further comprising: a light-emitting line disposed parallelto the first scan line; a fifth transistor including a fifth gateelectrode disposed in a fifth overlapping area of the active patternwhere the light-emitting line overlaps the active pattern; and a sixthtransistor including a sixth gate electrode disposed in a sixthoverlapping area of the active pattern where the light-emitting lineoverlaps the active pattern.
 8. The display device of claim 7, furthercomprising a third electrode pattern connected to a sixth drainelectrode of the sixth transistor.
 9. A display device comprising: afirst transistor; a second transistor connected to a first scan line, adata line crossing the first scan line and a source electrode of thefirst transistor; a power voltage line transferring a first powervoltage; a first storage capacitor connected to the power voltage lineand a gate electrode of the first transistor; a second storage capacitorconnected to the power voltage line and the gate electrode of the firsttransistor; a third transistor connected to the first scan line, thegate electrode of the first transistor and a drain electrode of thefirst transistor; and an organic light-emitting diode receiving a secondpower voltage and generating a light in response to operation of thefirst transistor.
 10. The display device of claim 9, further comprising;a fifth transistor connected to a light-emitting line, the power voltageline and the source electrode of the first transistor; and a sixthtransistor connected to the light-emitting line, a drain electrode ofthe first transistor and the organic light-emitting diode.
 11. Thedisplay device of claim 10, further comprising: a fourth transistorconnected to a second scan line, the gate electrode of the firsttransistor and an initializing voltage line receiving an initializingvoltage; and a seventh transistor connected to the second scan line, theinitializing voltage line and the organic light-emitting diode.
 12. Thedisplay device of claim 11, wherein the first scan line receives an n-thscan signal, and the second scan line receives an (n−1)-th scan signal,wherein n is a natural number.
 13. The display device of claim 9,further comprising a capacitor connected to the power voltage line andthe gate electrode of the second transistor.